Moving Beyond Kelly: Sizing Your Bets to Make More Money


If you’ve heard people discussing units, flat betting, or the Kelly Criterion and felt a bit lost, you’re not alone. Understanding how to adjust your bet sizing is crucial for any bettor. Let’s dive into the various methods and see what works best for you.

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Forget Units: Why They Don’t Matter

First off, let’s address the concept of “units.” Many touts and bettors use this term to obscure their actual results. The reality is, units are not helpful in sports betting. Your dollar amounts hold meaning, and abstracting them into units removes a critical aspect of the betting process. No sportsbook accepts units as payment, so we shouldn’t be discussing them in the first place. The emphasis should always be on actual dollar amounts.

The Problem with Flat Betting

Next, we have flat betting, where you wager the same amount on every bet. This approach seems straightforward, but it can lead to significant issues. For example, if you consistently bet $100, you’re not accounting for the different odds or probabilities of winning each bet. Betting $100 on a -200 favorite means you’re risking $100 to win $50. Conversely, if you bet $100 on a +200 underdog, you risk the same but stand to win $200. This imbalance can skew your results.

The Kelly Criterion: A Better Approach

The Kelly Criterion offers a more refined method for sizing your bets. It considers your edge and the likelihood of winning, helping you avoid overbetting and potential bankruptcy. This criterion is particularly useful for managing your bankroll effectively.

However, it’s important to remember that the Kelly Criterion was designed for scenarios with known outcomes, like blackjack. In sports betting, edges are often estimates. Thus, relying solely on the Kelly Criterion can lead to over-betting when the market is uncertain.

Real-World Application of the Kelly Criterion

Let’s say you’re evaluating a bet with a 7% edge and a 30% likelihood of winning. The Kelly Criterion would suggest a certain bet size based on those figures. But if you have concerns about the market’s stability, you might want to reduce that recommended size. Always view the Kelly number as a maximum amount you’re willing to bet, and adjust based on your confidence level and market conditions.

Balancing Your Portfolio

Think of your betting strategy like a financial portfolio. You want a mix of investments—some riskier underdog bets and safer favorites. If you’re overweight on one type, you could suffer when the unexpected happens. For instance, if you primarily bet on favorites and they lose, your results will suffer disproportionately.

Final Thoughts on Bet Sizing

In conclusion, don’t blindly follow any single method, whether that’s units, flat betting, or the Kelly Criterion. Each has its strengths and weaknesses. Instead, assess your situation, consider your confidence in the bet, and adjust your stakes accordingly. Remember, the goal is to maximize your long-term profitability while managing risk effectively.

For those looking to improve their betting strategies, consider joining the 8rain Station. It offers powerful analytics software that can help you make informed decisions and enhance your understanding of sports betting.

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